Microbially-enhanced redox solution reoxidation for sweetening sour natural gas

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Description

About twenty five percent of natural gas produced in the United States is sour containing significant volumes of hydrogen sulfide and other contaminants. Liquid redox processes remove hydrogen sulfide from natural gas. Aqueous solution of chelated ferric ions oxidize the hydrogen sulfide to elemental sulfur. The reduced iron chelate is then oxidized by contact with air and recycled. This requires expensive equipment for regeneration, costly chemicals and the process is usually energy intensive. Recent studies show that the ferric ion regeneration rates are substantially enhanced in presence of acidophilic bacteria. The specific objectives of this project are to advance the ... continued below

Physical Description

14 p.

Creation Information

Rai, C. June 1995.

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Description

About twenty five percent of natural gas produced in the United States is sour containing significant volumes of hydrogen sulfide and other contaminants. Liquid redox processes remove hydrogen sulfide from natural gas. Aqueous solution of chelated ferric ions oxidize the hydrogen sulfide to elemental sulfur. The reduced iron chelate is then oxidized by contact with air and recycled. This requires expensive equipment for regeneration, costly chemicals and the process is usually energy intensive. Recent studies show that the ferric ion regeneration rates are substantially enhanced in presence of acidophilic bacteria. The specific objectives of this project are to advance the technology and improve the economics of the commercial iron-based chelate processes utilizing biologically-enhanced reoxidation of the redox solutions used in these processes, such as LO-CAT II and SulFerox.

Physical Description

14 p.

Notes

OSTI as DE95012311

Source

  • Natural gas research, development and demonstration contractors review meeting, Baton Rouge, LA (United States), 4-6 Apr 1995

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Identifier

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  • Other: DE95012311
  • Report No.: DOE/MC/31162--95/C0465
  • Report No.: CONF-950494--11
  • Grant Number: FG21-94MC31162
  • DOI: 10.2172/82537 | External Link
  • Office of Scientific & Technical Information Report Number: 82537
  • Archival Resource Key: ark:/67531/metadc789078

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Creation Date

  • June 1995

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • Feb. 8, 2016, 7:42 p.m.

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Rai, C. Microbially-enhanced redox solution reoxidation for sweetening sour natural gas, report, June 1995; Kingsville, Texas. (digital.library.unt.edu/ark:/67531/metadc789078/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.